青东煤矿828机巷条带解突评价报告未被保护区170m范围.doc

淮北矿业股份有限公司青东煤业有限公司828工作面机巷条带（未被保护区170m区段）区域防突措施效果评价报告编 制 人： 瓦 斯 办： 副总工程师： 总工程师： 青东煤业有限公司 2012年10月1 828工作面概况1.1工作面概述828工作面位于82采区726工作面下覆，上为826工作面（未掘进），下为8210工作面（未掘进），东为82采区上山煤柱边界线，西与828里工作面（未掘进）相邻。工作面标高-515-580m，走向长600m，倾斜长130m，预计回采时间2013年7月底。1.2煤层赋存情况本区煤（岩）层产状040518平均13，煤层厚度为6.213.2m，平均9.2m，8煤层为黑色，粉末状为主，少量块状，为暗煤，半暗型，局部含一层夹矸。8煤层为较稳定煤层、变异系数为31.8、可采指数为1。该区8煤层直接顶为泥岩，厚约1.83.2m，平均为2.7m，灰-深灰色；老顶为砂岩，厚约10.620.2m，平均为18.7m，灰色；直接底为泥岩，厚约3.06.2m，平均为4.6m，深灰色；老底为粉砂岩，厚约3.06.5m，平均为5.0m，灰色。1.3地质构造情况根据三维勘探资料并结合726工作面回采情况综合分析，828工作面掘进过程中将揭露断层10条，大于10m断层1条(82-DF28)对机、风巷的掘进影响大，大于5m小于10m断层1条（82-DF25）对机、风巷的掘进影响较大，小于等于5m断层8条（82-DF34、82-DF22、82-DF40、82-DF20、82-DF33、82-DF32、82-DF21、82-F1）对机、风巷的掘进影响较小。表1-1 726工作面断层情况表构造名称走向（）倾向（）倾角（）性质落差（m）82-DF3426535572正0-382-DF2223732730正0-382-DF401708035正0-382-F110829870正582-DF3321330321正0-282-DF3222131133正0-282-DF2122831831正0-282-DF2018527523正0-382-DF2520129141正0-820829860正0-882-DF2820511566正0-3520511555正0-351.4瓦斯赋存情况及其它1.4.1 工作面被保护区域828工作面采取先回采上部7煤层（726工作面）的区域防突措施，被保护区域实测8煤层最大瓦斯压力0.3MPa、最大瓦斯含量4.5m3/t。1.4.2 工作面未保护区域由于726工作面提前收作，828工作面外段一定范围内处于未保护范围内，该区实测8煤层最大原始瓦斯压力1.1MPa、对应8煤层瓦斯含量10.3m3/t、8煤煤体坚固性系数（f值）0.25、瓦斯放散初速度（P）10.8 。8煤层煤尘具有爆炸危险性，为自燃煤层（类、最短发火期107天）；该区段恒温带温度为17.1，地温梯度平均2.8/100m左右，巷道施工地温为3133左右 ，为一级高温。1.5通风系统（1）828机巷掘进工作面已建立独立、可靠的通风系统。（2）采用两台30KW2对旋式局部通风机配套800mm风筒压入式供风（局部通风机一台工作，一台备用）。（3）已按规定在828轨道石门设置正反向风门一组，墙体厚度不小于800mm，其质量符合质量标准化标准要求。（4）穿墙风筒使用铁质风筒，并安装防逆流装置；风筒吊挂平直、逢环必挂、接头采用双反压边；出风口距掘进工作面迎头不大于5m，确保掘进工作面风量充足。（5）进风系统：地面副井西翼轨道大巷82采区轨道石门82采区轨道上山82采区三中车场局部通风机风筒迎头。（6）回风系统：迎头828运输上山828运输石门82采区回风上山82采区回风石门西翼回风大巷风井地面。2 828机巷瓦斯治理方案2.1 7煤煤巷下向穿层钻孔预抽煤层瓦斯在726机巷间隔5m，施工一组钻孔，每组施工10个钻孔，施工24组，共施工240个钻孔，钻孔直径113mm，终孔轴向间距为5m，钻孔终孔穿过8煤至底板0.5m，保护巷道两侧轮廓线20m。具体方案见图2-1和2-2。图2-1 828机巷条带5m5m穿层钻孔布置剖面图 图2-2 828机巷条带55m穿层钻孔布置平面图2.2综合水力化防突措施在7煤煤巷中施工钻孔，钻孔打完以后，用高压水反复冲刷钻孔，然后封孔进行瓦斯抽放，抽放一段时间后，向孔内注入高压水压裂煤体，再进行瓦斯抽放，最后封住钻孔进行低压长时间充分湿润煤体，达到消除突出危险性的目的。采用高压注水，必然在煤层中形成裂缝和通道，使煤体卸压，增大了煤层透气性。排出的煤屑越多，卸压效果越好；然后采用低压长时间注水充分湿润煤体，使煤层含水量达到34%；如有必要，进一步采用抽放措施，提高防突效果。该方案工艺流程图2-3。具体工序为：1）水力排渣施工钻孔：钻孔施工可以用水压和风压施工，但是在下向孔的施工过程中，利用风压施工不易排渣，往往造成钻孔、顶钻，因此考虑利用水力排渣施工钻孔，可避免出现卡钻、顶钻，有利于排渣，提高钻孔成孔率。2）水力冲孔：钻孔施工完毕之后，不要立即退出钻杆，此时增大水压力，将高压水流沿钻杆送入孔底煤层中。开动钻机，使钻头在煤体中上下移动，冲刷孔底煤层，使煤层充分卸压，增大透气性，提高瓦斯排放效果。反复冲刷至钻孔内冲出的煤量大于钻孔控制范围内煤体总量的2%。3）抽放：水力冲孔完毕后下PE管，PE管下至煤层顶板时，加固孔壁，PE管露出200300mm，端部连接法兰。将抽放管路铺设至抽放钻孔处，通过快速接头与管路端部法兰连接，然后进行瓦斯抽放，抽放1个月。4）高压注水：瓦斯抽放一个月后，将抽放管路卸下，通过快速接头与注水管路连接，采用乳化液泵进行注水，注水一段时间后，煤层中会形成裂缝和通道，使煤体卸压，增大了煤层透气性。水压控制在1530Mpa（具体水压根据现场试验来确定）。注水过程中，当注水泵压力降低为峰值压力的30%左右，可以作为注水结束时间。2.3 8煤煤巷顺层钻孔预抽煤层瓦斯顺层钻孔布置按钻孔孔底轴向间距5m5m密集布置，共施工4茬，每茬钻孔控制范围至巷道两侧轮廓线外20m，控制条带长度60m，压茬20m。具体方案见图2-4和2-5。2-4 8煤未被保护区域煤巷条带顺层长钻孔平面布置图2-5 8煤未被保护区域煤巷条带顺层长钻孔剖面布置图3 828机巷条带（未被保护区170m区段）区域防突措施效果评价3.1 726机巷抽排钻孔施工情况参考防治煤与瓦斯突出规定中的相关要求，为了保证828工作面机巷掘进过程中的安全，现对726机巷抽排钻孔控制的机巷条带区域（未被保护区170m区段）进行防突效果分析，评价该区段的突出危险性。现将该区段所采取的措施进行汇总。表3-1为726机巷抽排钻孔施工参数统计结果。表3-1 726机巷抽排钻孔施工记录726机巷控制828机巷条带穿层钻孔施工记录孔号偏角（）倾角（）岩石（m）穿煤长（m）顶板（m）终孔长（m）2-10-3241.515056.52-20-3835.314.31.551.12-30-43.533.515.51.250.22-40-49.529.816.21.147.12-50-56.12912.5142.52-60-6327.814.41.443.62-70-7026.912.21.540.62-80-772910.51.5413-10-3238.716.11.356.13-20-38.334.516.71.352.53-30-43.132.511.7044.2透3-30-4332.514.30.747.53-40-49.830.713.81.846.33-50-56.528.514.71.444.63-60-63.528.812.91.543.23-70-70.229.210.91.141.23-80-7728.610.60.639.84-10-31.637.818.11.157.34-20-38.135.214.51.551.24-30-42.531.216.40.748.34-40-49.531.212.61.345.14-50-56.330.812.71.645.14-60-632912.51.342.84-70-7030.110.2141.34-80-7728.611.11.541.25-10-3241.616.10.858.55-20-383313.1046.1透5-20-383317.50.5515-30-433215.50.5485-40-503214.50.5475-50-5629.612.80.943.35-60-6329.811.30.541.65-70-702810.60.5395-80-7730.610.5142.16-10-3239.58.8048.3透6-10-3238170556-20-3845.87.5053.36-30-4332.112044.1透6-30-4331.515.20.547.26-40-5032.811.5145.36-50-5629.69.71.340.66-60-6327.812.31.141.26-70-7027.611.61.440.66-80-7728.411.50.840.77-10-3239.510049.5透7-10-3239.517.50.557.57-20-383715.50.5537-30-42.537.6140.552.17-40-5034.5120.5477-50-5630.616.10.547.27-60-6329.5100.5407-70-7029.710.80.741.27-80-76.828.510.50.539.58-10-324115.50.5578-20-37.833.814.20.648.68-30-4337130.550.58-40-48.233.59.20.543.28-50-563512.50.5488-60-6132.511.50.544.58-70-7030.710.10.541.38-80-77309.50.5409-10-31.540.513.6155.19-20-3835.712.31499-30-4333.510.51459-40-5032.112.30.845.29-50-5630.510.70.8429-60-63.231.59141.59-70-7030.510.50419-80-7732.8100.543.310-10-3245.311.10.857.210-20-3837.311.715010-30-43341014510-40-5034.512147.510-50-5632.59.514310-60-6331.59.514210-70-7129.5100.54010-80-73.5301014111-10-3241.516.10.658.211-20-3839.512.60.752.811-30-4336.811.41.249.411-40-49.632.411.30.544.211-50-5532.59.7143.211-60-62.530.310.10.440.811-70-70.530.58.70.739.911-80-7729.891.540.312-10-3241.816.70.659.112-20-37.539.312.90.652.812-30-43.5359044透12-30-43.53511.20.84712-40-5032.510.21.544.212-50-5630.710.11.442.212-60-62.731.68.70.841.112-70-70.229.59.61.340.412-80-7830.87.51.940.213-10-32.538.213.61.25313-20-3838.313.20.652.113-30-42.535.28.51.845.513-40-49.533.210.71.645.513-50-5630.58.4139.913-60-62.531.58.51.241.213-70-7031.88.21.541.513-80-7730.67.91.339.814-10-2742.614.2157.814-20-32429.5051.5透14-20-324210.51.55414-30-3837.510148.514-40-43.234.5110.54614-50-5034.58.514414-60-5632.590.54214-70-63.530.410.5141.914-80-7030.15.70.536.314-90-77.529.88.70.53914-100-8330.67.70.73915-1右3.8-24.84912.5162.515-2右3.8-30.738.5120.55115-3右5-36.537.110.91.249.215-4右5-42.535.810.214715-5右7.1-49.432.79.50.84315-6右7.5-56.531.710.8143.515-7右11-63.231.511143.515-8右13-7029.89.50.74015-9右23.5-7730.29.30.840.315-10右38.7-8329.59.514016-1右8-24.641.590.55116-2右9-30.54110.50.55216-3右12-3638.510.50.549.516-4右12-42.533.510.21.34516-5右15-48.533.58.61.243.316-6右17-5530.59.514116-7右22.6-61.731.5100.54216-8右29-68.530.2100.84116-9右43-7432.510.514416-10右61-78.530.18.61.540.219-1右10-2839.512.51.353.319-20-3338.512.51.152.1补19-2右11-3337.810.20.448.419-3右13-3935.410.50.546.419-4右13.5-43.533.59.41.344.219-5右17-49.530.510.71.242.419-6右20-5529.59.51.240.219-7右26-6129.89.90.640.319-8右33-6829.59.20.939.619-9右48-7330.29.20.64019-10右66-76.531.87.61.841.220-2右15.5-2650.811.10.562.420-1右15-2346.312.51.350.120-3右16.7-29.740.512.20.553.220-4右18.5-3538.210.10.74920-5右22-4133.591.243.720-6右25.5-4732.28.41.542.120-7右30-5330.78.50.940.120-8右36.5-58.533.17.80.741.620-9右46.5-63.531.57.41.340.220-10右58.5-67.530.17.50.538.121-1右20-22.552.112.30.364.721-2右20-2939.510.81.551.821-3右22-2945.511.7057.2透21-3右22-2945.513.90.66021-4右25-3438.710.51.350.521-5右29-39.534.78.31.244.221-6右324531.910.30.84321-6右23-452221-7右37.5-50.531.57.51.140.121-8右44-55.531.28.81.141.121-9右55-5933.581.54321-10右65-6331.781.240.922-1右21.5-21711.21.15522-2右19-35.539.310.21.55122-4右25.5-46.535.191.545.622-5右34-3838.810.71.751.222-6右36-583281.641.622-7右44-47.532.89.71.744.222-8右58-6831.36.713922-9右59.5-5533.59.61.244.322-10右69-58.531.48.31.841.523-1右22-2943.610.61.555.723-2右35-3137.410.51.249.123-3右29-39.533.59.50.443.423-4右43-4035.39.21.646.123-5右38-5030.79.80.641.123-6右55-4933.510.52.146.123-7右54.5-59.430.99.21.341.423-8右73-5032.510.31.344.124-1右35-2637.811.11.250.124-2右38.5-30.836.512.81.851.124-3右44-3434.510.21.546.224-4右48-3833.811.31.146.224-5右54-4235.710.81.347.824-6右60-4538.511.51.551.524-7右67-4933.411.41.546.324-8右75-51.536.511.61.849.91-10-4833.59.8144.31-20-543490.543.59#0-47.531.512.31.245补100-5432.410.61442-10-4932.510.52452-20-5431.510.21.543.23-10-4832.59.21.543.23-20-54328.50.5414-10-48.532.511.51454-20-5432.29.51.3435-10-4832.910.51.6455-20-5432.19.61.543.26-10-493310.50.844.36-20-5431.810.70.843.37-10-483310.20.8447-20-5432.5100.5438-10-47.532.5101.5448-20-5431.5100.54216-20-1391809916-30-17.556.810.3168.116-40-22.646.511.5159注：穿煤长度为0表示钻孔施工过程中未见煤。3.2 煤巷顺层钻孔施工情况参考防治煤与瓦斯突出规定中的相关要求，为了保证828工作面机巷掘进过程中的安全，现对828机巷顺层钻孔控制的机巷条带区域（未被保护区170m区段）进行防突效果分析，评价该区段的突出危险性。现将该区段所采取的措施进行汇总。表3-2为828机巷顺层钻孔施工参数统计结果。表3-2 828机巷顺层钻孔施工记录828机巷控制机巷条带顺层钻孔施工记录（第一茬）孔号偏角（）倾角（）岩石（m）穿煤长（m）顶板（m）终孔长（m）1-1左11.28.3048.31.7501-2左114051.5152.51-3左22.32.40260261-4左53-1.5022.5022.52-1左662.556.2058.72-2左73046.2046.22-3左12.7-2.1250.5052.52-4左37-12021.5021.53-1左45067.1067.13-2左3.81.5033.22.135.33-3左8-4045.71.647.33-4左24-19030.31.231.54-1左1.54.5046.2147.24-2左1.31.1036.2036.24-3左3.5-6037.3037.34-4左11-26024.80.725.55-103.5024.612.236.85-200038.31.239.55-30-7.5036.7036.75-40-29.5024.50.725.26-1右23036.70.537.26-2右2-1039.70.940.66-3右5-9.5040.7040.76-4右15-33021.60.626.77-1右61.5056.9056.9 7-2右6-2.5068.7068.7 7-3右13-12038.7038.7 7-4右35.6-34.2033.21.434.6 8-1右12-1463.61.669.2 8-2右11.6-4072.11.173.2 8-3右25.1-15.3051.51.753.28-4右56-32057.4057.4补5-30-7.5051.6051.6补4-3左3.5-6056.3056.3补6-3右5-9.50790.579.5 补5-30-7063.5063.5 补7-3右13-12069.12.271.3补6-2右2.1-0.6071.4071.4828机巷控制机巷条带顺层钻孔施工记录（第二茬）孔号偏角（）倾角（）岩石（m）穿煤长（m）顶板（m）终孔长（m）1-1左41.823.5031.2031.21-2左18.516051.5051.51-3左13.311.5079.5079.51-4左13.57.3060.5060.51-5左13.54052.5052.51-6左290047.6047.61-7左60-4013.5215.52-1左3318038.6038.62-2左1313045.3045.32-3左108.5059.5059.52-4左9.85053.6053.62-5左101060.5060.52-6左22-6028.5028.52-7左51.5-1706.12.68.73-1左1018.50310313-2左3.512052.2052.23-3左2.58055.2055.23-4左2.54.1090.6090.63-5左2.50046.9046.93-6左6-8029.37029.73-7左18-2806.3410.64-1017025025补4-1017.1050.22.152.34-2011.50460464-308060.5060.54-4040520524-500065.7065.74-60-9030.12.232.34-70-32.507.51.38.85-1右7.514.50411.842.85-2右2.510.50750755-3右27080.5080.55-4右2.23.6072.32.274.55-5右4.2-2.1046.32.448.75-6右2-5045.5045.55-7右13-3608.5210.56-1右19.58.5021.5021.56-2右7.88.2051.6051.66-3右56071.5071.56-4右52064.82.367.16-5右5.8-3.1032.61.233.86-6右12-13.5019.83.723.56-7右34-37.2010.51.111.67-1右4210.5025.3025.37-2右18.510052.9052.97-3右12.57075.2075.27-4右12.53.1071.6071.67-5右14.1-1.50511.852.87-6右28-10032.31.333.67-7右60-20.7023.71.625.3828机巷控制机巷条带顺层钻孔施工记录（第三茬）孔号偏角（）倾角（）岩石（m）穿煤长（m）顶板（m）终孔长（m）2-1左6435026.70.527.22-2左4729029.51.330.82-3左31.527.5030.2030.22-4左2022.1045.6045.6透2-4左2222055.5055.52-5左1518.5041.2041.2透2-5左15.518.5056.8056.82-6左15.715038038透2-6左15.716.5056.7056.72-7左15.713.5058.6058.63-1左50.335.50341353-2左31.533019.7019.7透3-2左31.533032.1133.13-3左1928038.6139.63-4左1221.5052.2153.23-5左9.518.5056.71.858.53-6左9.515.6059.3059.33-7左9.512.5063.8063.84-1左27.245028.71.630.34-2左15.128034.51.135.64-3左8.525042.3143.24-4左518050.21.251.44-5左415049.3049.3透4-5左417058.7058.74-6左412.5060.8060.84-7左410.1051.21.652.85-1039026.62.629.25-2035033.51.735.25-3025040.5040.5透5-3025.1042.51.5445-4018050.7050.7透5-4018.5055.7055.75-5014061.6061.65-60110540545-707.50680686-1右24.534.20211.522.56-2右1333027.81.729.56-3右7.523.5043.5245.56-4右4.517.8046.3046.3透6-4右518055.5055.56-5右3.713.1060.2060.26-6右3.510050.3050.3透6-6右49.50590596-7右3.57036.51.5387-1右4533.5020.2121.27-2右2729027.31.128.47-3右1622038.52.5417-4右1016.5043.5043.5透7-4右1016066.5066.57-5右7.513044.5044.5透7-5右7.5130550557-6右7.59.5050.3050.3透7-6右7.59.50710717-7右7.56024.81.726.5透7-7右88065.8065.88-1右59.527026.21.727.98-2右4124028.12.130.28-3右27210401.241.28-4右17.316.9045.3045.3透8-4右17.316.9052.61.754.38-5右1313.7061.2061.28-6右1310.8067.2067.2透8-7右13.17.2070.8070.88-7右13.14.80281.129.1828机巷控制机巷条带顺层钻孔施工记录（第四茬）孔号偏角（）倾角（）岩石（m）穿煤长（m）顶板（m）终孔长（m）1-1左4430.5037.3037.31-2左3126032.3032.31-3左2221.5044.6044.61-4左1518.5050.6050.61-5左1515049.3049.31-6左1511.5046.7046.7补1-6左1511.5052.8052.81-7左169039.5039.5透1-7左169054.6054.62-1左3335.8015.3015.3透2-1左3335.8026.8026.82-2左22.529017017透2-2左22.529029.6029.62-3左1523039.6039.62-4左10.519048.7048.7补2-4左1019057.3057.32-5左10.516044.5044.5补2-5左10.516051.6051.62-6左10.512032.5032.5补2-6左10.512048.2250.22-7左10.59.5056.1056.13-1左16390101.311.33-2左10.530011.2011.2补3-2左10.530034.3034.33-3左6.523.5041.3142.33-4左4.519.2057.4057.43-5左4.516060.2060.23-6左4.512.5038.22.340.53-7左4.59043.3245.34-10400211.322.34-2030.5036.71.538.24-3024.30451.546.54-4019043.20.643.84-5016050.41.752.14-6右1