煤与瓦斯突出矿井安全煤量研究及应用外文文献翻译

英文原文Research on Safety Coal Quantity and its application to Coal and Gas Outburst MineWang Haifeng1, Cheng Yuanping1, Yu Qixiang1, Zhou Zongyong2, Zhou Hongxing1, Liu Hongyong1（1. School of Energy and Safety Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, 221008, China; 2. Qinan mine, Huaibei Coal Co.Ltd, Suzhou, Anhui, 234115, China）Abstract：In view of excavate tension in coal and gas outburst mine and the demand for supervision of coal mine safety, the paper puts forward the concept of safety coal quantity. Safety coal quantity is a part of preparatory coal quantity and means non-outburst danger coal quantity in preparatory coal quantity . Safety coal quantity consists of four parts, preparatory coal quantity in non-outburst danger coal seam, preparatory coal quantity in non-outburst danger region, preparatory coal quantity of non-outburst danger by verification prognosis in outburst threaten region and preparatory coal quantity of non-outburst danger with regional gas control in outburst danger region. For mining safety, mining coal quantity must be safety coal quantity and is a part of its. After analysis of “three coal reserves” and safety coal quantity of Qinan mine in Huaibei Coal Mine Area，it is concluded that safety coal quantity covers about four-fifths of preparatory coal quantity and 2.3 times of mining coal quantity. The mineable periods of preparatory coal quantity, safety coal quantity and mining coal quantity is 16.6 months, 13.3 months and 5.9 months, respectively. According to practical situation of Qinan mine, safety coal quantity of Qinan mine meets the requirement of normal relay and mining safety. Keyword: coal and gas outburst coal mine; safety coal quantity; “three coal reserves”; regional gas control; the engineering methodOur coal mine after decades of underground mining, mining level gradually extended to deep. In 2004, the average large and medium-sized coal mine mining depth of 456 m, 800 m of mining depth more than 15 place, more than 1000 m of coal mine has eight place, the national coal mining every year about 10 to 20 m (fastest nearly 50 m) speed to the deep extending depth 1. Along with the increase of mining depth mine, coal seam gas pressure and gas content increases year by year, some from low gas mine mine mine for a gradual shift gas or coal and gas outburst mines, China has become the world and coal and gas outburst of the countries most affected by the disaster. According to a 2005 45 families to key state-owned coal mining enterprises to carry out surveillance of the safety consultation, 45 door key monitoring state-owned coal mining enterprises in the 415 mines gas and coal and gas outburst mines, 56.4% to 234, including coal and gas outburst mines, 34.2% of 142 2.In order to avoid coal mining to replace nervous, maintain the normal take mine, in 1961, the coal industry released on mine and open coal mine exploit quantity, amount to coal mining and back to the provisions of the amount to differentiate limits (hereinafter referred to as the regulations) 3. As from the mine outburst mines coal and gas outburst mines to upgrade, the country in the formulation of the mine to ensure smooth take three quantity regulation has gradually can not adapt to the coal and gas outburst mines to replace the need. Many coal and gas outburst mines, in actual three quantity and three quantity recoverable period far outweigh the rating occur excavates taking over nervous phenomenon, the main reason is the three quantity of coal and coal to amount to a portion of the coal quantity should have outstanding danger, need to pass regional gas control will eliminate outstanding dangerous mining operations. Gas treatment need time and space, if not mine reserve enough gas treatment time and space will lead to replace nervous. Many of the coal mine enterprises also began to ItalySecurity is refers to the coal and coal and gas outburst coal mine is to has no prominent risk within the scope of the part of the coal quantity, belongs to the quantity of coal to part. Recovery must ensure safety mining face, back to the coal mining quantity belong to safety quantity of coal part. To do mine smoke, digging, adopt balance, ensure the smooth and safe to replace mine mining, the extraction in the design and engineering arrangement, want to do well with the coal production organization coordination, make the safety of coal mine and three quantity in coordination. Ready to coal to be built on the formation and perfection of the gas extraction system or have protective layer on the basis of mining condition, ensure the safety of coal mining normal take over. Safety of coal to build in coal seam gas after a full extraction, and on the basis of reached the coal gas extraction basic indicators requirements, meet the safety mining conditions based on 4.1 safety put forward quantity of coal In view of Chinas coal and gas outburst coal mining to replace nervous and the present situation of coal mine safety supervision work needs, puts forward the coal and gas outburst coal mine safety of concept. Security is refers to the coal and coal and gas outburst coal mine is to has no outstanding dangerous within that part of the amount of coal, mining operations can be directly in the safety of coal within the, safety of coal a see figure 1. Coal and gas outburst mines generally includes prominent coal seam and the prominent coal seam, is ready to coal quantity also include prominent in the corresponding to coal seam and the outstanding amount of coal seam for quantity. The highlight of the coal seam is no danger to highlight, can be directly in the preparation of coal within the mining operations, this part of the coal quantity to belong to the safety of coal. Highlight the coal seam for quantity according to the regulation to highlight the region, dividing the danger zone, no prominent outstanding threatened area and highlight the danger zone. No outstanding in areas of coal quantity, not highlight dangerous, can directly mining operations, belongs to the safety of coal. axonSafety quantity of coal recoverable time is for safety mining coal quantity can be period. Safety quantity of coal reasonable recoverable period refers to the coal and gas outburst coal mine safety is the reasonable time for mining, coal safety had measured less cause the coal mining to replace nervous. Safety quantity of coal mining is to cover with the coating of discharging pressure gas extraction and the coal gas, and other regional pumping gas treatment technology is given priority to, with quaternity local gas treatment technology, to ensure safety of coal can meet the needs of the outstanding coal mining take over. In the mining of coal seam, give priority to the protective layer with the coating of mining by releasing pressure gas extraction technology; Does not have the protective layer in mining under the condition of coal seam by the smoke gas treatment technology.准备煤量区域划分突出危险区无突出危险区区域性瓦斯治理措施瓦斯治理措施检验性预测否是安全煤量已无突出危险评价及措施效果检验Fig.1 Safety coal quantity composition突出煤层煤量非突出煤层煤量突出威胁区突出威胁区突出危险区2 safety of coal and three quantity the relationship回采煤量Fig.2 The relation between safety coal quantity and “three coal reserves”准备煤量开拓煤量安全煤量The regulation is passed in 1961, when the mine mining depth is shallow and coal and gas outburst mines less, less prominent coal, coal seam outburst dangerous small, return roadway can be directly in preparation for the most amount of coal tunneling. But as mine to upgrade the outburst mines, coal mining coal seam by the outstanding change for outstanding coal seam, is ready to coal included a part with prominent dangerous coal quantity, so that the amount of coal to back to cause certain effect. Prominent mine exploit coal quantity, and preparing for the coal mining quantity and quantity and back to the safety of coal quantity relationship figure 2.According to the safety of coal, the definition of safety of coal to belong to the quantity of coal a part, is ready to coal quantity without outburst dangerous in that part of the coal quantity. In tunneling of the area in the necessary roadway, such as mining, and went down the mountain on mining and parking space, the coal mine to amount can form 4. In a certain period of coal safety accounts for only of the quantity of coal to part. Safety of coal includes four parts: 1) the outstanding amount of coal seam for; 2) no outstanding outstanding coal seam in areas of quantity to coal, 3) outstanding threatened area the examine forecast for no outstanding dangerous ready to coal quantity; 4) outstanding by regional gas control area after inspection effect for no outstanding dangerous ready to coal quantity. So in the safety of coal tunneling of the formation of the roadway in coal is the amount to of coal and gas outburst mines for safety mining of coal quantity, back to the safety of coal mining quantity belong to part.3 safety engineering method, the quantity of coalIn order to guarantee the smooth and safe to replace mine mining, must follow the to take a after the gas control principle, to have prominent dangerous ready to coal quantity must take regional gas control measures CaiMeiCeng pumping gas, lower coal seam gas content and pressure, make ready to coal quantity achieved the coal gas extraction basic indicators requirements. The common regional gas control measures include protection layer by layer discharging pressure mining combination gas extraction and the coal seam gas technology smoke two 5,6,7. To ensure the safety of coal mine, mine must be 3 5 years in advance for gas extraction planning, before the end of the next fiscal year every year for the extraction gas plan, do smoke, digging, adopt balance, to ensure the normal working of gas extraction cohesive 8.3.1 protection layer with coal mining is protection of discharging pressure gas extraction technologyIn coal seam mining group of conditions, mining and priority protection layer by layer discharging pressure gas extraction technology. When protection layer after mining, be cover happen inflation deformation, yield joints, coal seam gas permeability increase, form the gas discharging pressure flow conditions, and the wear layer or the ground method such as drilling borehole extraction by the coating of discharging pressure gas, gas will highlight dangerous area into low gas no outstanding dangerous area, realize the outstanding coal seams to security quantity of coal to change. Huainan mineral mining coal seam a pan B11 as protection layer, layer of mining and extraction was protection layer of coal seam gas C13, that is the sky discharging pressure, C13, that is the sky coal seam gas extraction rate is over 60%, reduced the coal seam gas content, the comprehensive eliminates the C13, that is the sky coal and coal and gas outburst danger, realized the smooth mine and the Lord CaiMeiCeng take over the safety and efficiency extraction 9, 10.3.2 the coal seam gas technology smokeIn a single coal bed mining conditions, the advance of coal seam gas drilling a technology to reduce coal seam gas content, eliminate the outburst dangerous coal seam, will highlight the coal seams into safety of coal. According to the arrangement of drilling in different ways, the coal seam gas technology mainly adopts pumping the following three ways. The first kind is all adopt the bottom layer represents large area in drilling smoke gas, coal mining face to eliminate outstanding danger, then heading and recovery of roadway mining face, huaibei coal mine two level 8 result of coal seam gas treatment USES this way. The second method is to use floor wearing layer represents coal roadway tunneling of the drilling a regional gas, coal roadway safety after tunneling of the cover, and again from coal HangZhong construction along the layer borehole extraction from coal mining face gas, and ensure the safety of mining, huaibei coal seam, 81 mining area of jing of gas control by using this method. The third kind of for the next along the layer to screen for long drill progression regional gas extraction method, which is suitable for the geological way simple structure, stable, dip Angle small, occurrence4 engineering example is analyzed4.1 mine situationHuaibei coal mine of jing for coal and gas outburst mines, the Lord CaiMeiCeng for 32, 72 and 10 coal seam, including 32 and 72 for outstanding coal seam coal seam, the outstanding for 10 coal seam coal seam. By the end of December, 2006, mine including 101, 81, 82 and 34 four activities panel, a ready to mining (84 mining area), a pioneering panel (31 panel). The outstanding region, for 32 coal seam, outcrop 550 m for no outstanding-of danger-550-650- m highlight threatened area,-650 MB for outstanding danger zone; For 72 coal seam, outcrop 435 m for no outstanding-of danger-435-460- m highlight threatened area,-460 MB for outstanding danger zone.4.2 three quantity statistical analysisBy the end of December, 2006, the coal mine development capacity of 60.547 million t, ready to coal quantity is 2.66 million t, back to the coal mining quantity is 945000 t, three quantity recoverable period of 30.3 years, respectively 16.6 months and 5.9 months, three quantity and three quantity recoverable period to meet the requirements of the regulations. Mine three quantity the constitution see table 1.Table 1 Safety coal quantity composition of Qinan mine“三量”煤量/万t10煤层71、72煤层32煤层合计101采区81采区82采区84采区31采区34采区开拓煤量586.6639.97781640.68011608.86054.7准备煤量50.3110.043.762266.0回采煤量8.424.16294.5Because mine stope complex geological conditions, the occurrence of coal seam is not stable, 10 coal seam face faults, fold-the dense structure, severely affected by magmatite erosion, 32 coal seam face first for fully mechanized working face, and promote speed, and ready to cycle is long, the mine production and improve the range cause for development of large coal accordingly. Ready to coal quantity, back to the coal mining quantity recoverable period is more reasonable, can satisfy the mine production needs.4.3 security coal quantity statistical analysisFrom the coal mining and the mining face, and corresponding name, face and the gas outburst dangerous control measures and so on several aspects of the safety of coal mine coal quantity of jing statistics, see table 2. 10 for the outstanding coal seam coal seam, the 10 coal seam coal quantity to belong to the safety of coal, including the 1011 and 1013 two working face of coal. The 81 mining area for coal quantity is 713 and 714 two working face of coal, 714 working face of the coal seam gas measures by smoke, has the outstanding work to eliminate risk, this part of the safety of coal belongs to coal, 713 working face are for gas treatment, 713 face still do not belong to the safety of coal quantity of coal. The 82 mining area for coal quantity is 721 and 7122 working face of coal, the two face are in no outstanding danger zone, this part of the coal quantity to belong to the safety of coal. 34 the coal mining to capacity of 3410 working face of coal, 3410 face in a prominent threatened area, the prediction that the mining face though themeaning after having outstanding risk, the bedding long drilling the coal seam gas smoke to solveTable 2 Safety coal quantity composition of Qinan mine开采煤层10煤层71、72煤层32煤层采区101采区81采区82采区34采区工作面1011、1013714721、71223410工作面突出危险性非突出煤层突出危险区无突出危险区突出威胁区瓦斯治理措施预抽煤层瓦斯顺层长钻孔预抽煤层瓦斯安全煤量/万t50.35843.762总计/万t214.0Three quantity jing coal mine safety and quantity of coal and the relationship between a table 3. From the table can be seen, the safety of coal belongs to prepare quantity of coal part, back to the safety of coal mining quantity belong to part.Table 3 Relationship of “three coal reserves” and safety coal quantityCoal quantity10 coal seam71、72 coal seam32 coal seam开拓煤量101采区81、82、84采区31、34采区准备煤量1011、1013工作面721、7122、713、714工作面3410工作面安全煤量1011、1013工作面721、7122、714工作面3410工作面回采煤量1011工作面721工作面3410工作面4.4 the mine safety condition analysisFig.3 Over-level times of gas concentration of Qinan mine in 5 yearsCoal mine of jing through nearly three years to adjust, gas control to achieve the regional management measures, the management measures as local complementary comprehensive control strategy of the gas disasters, mine stope space layout and time, implementation the three ensemble a gun high (outstanding) low gas area and four lines alternate take over for gas disasters regionalization provides time and space security. The implementation of these measures of jing for coal mine safety formed enough of coal, coal mining relationship coordination, the mines safety conditions improve, nearly three years not mine accidents. Nearly five years of mine gas concentration overrun number see chart 3200 6 years production rawcoal 2.16 million t, mine gas concentration decreased frequency overrun to five.5 last wordAccording to the definition of coal safety of analysis, the safety of coal seam preparation includes the outstanding amount of coal seam coal, prominent no outstanding in areas of coal quantity, to highlight the threat area for forecasting though themeaning without outstanding dangerous coal quantity and highlight the danger zone to the regional gas control effect for no outstanding after inspection of the danger to the four parts of coal quantity. Safety of coal is to belong to the quantity of coal part, it is not to the three quantity the negative, but the three quantity the supplement and complete, the number of security coal quantity can not only ensure the smooth