充填开采控制地表沉陷的关键因素分析.docx

充填开采控制地表沉陷的关键因素分析瞿群迪，姚强岭，李学华，荣同义(中国矿业大学矿业工程学院，江苏徐州 221116)摘要：充填开采是控制地表沉陷的有效技术手段之一为了提高充填开采的地表沉陷控制效果，采用理论分析和数值计算研究方法，对采空区全部充填法的地表下沉系数进行了预计，分析了充填开采控制地表沉陷的各影响因素研究表明：充填前顶底板移近量、充填体欠接顶量和充填体压缩量是造成地表下沉三个关键因素，提高充填体的接顶率是减小充填开采地表下沉系数的最有效途径，提高充填体强度可以在一定程度上提高对地表下沉的控制效果关键词：充填开采；地表沉陷；影响因素；充填体接顶率中图分类号：TD 8237 文献标识码：AKey Factors Affecting Control Surface Subsidence in Backfilling MiningAbstract：Backfilling mining is one of the most effective technical measures to control surface subsidenceIn order to reprove the control effect of surface subsidence caused by backfilling mining，we estimate the subsidence factor of the full go backfilling and also analyze how these factors affecting the surface subsidence through theoretical analysis and numerical calculationThe result shows that the roof-tofloor convergence before backfilling， the gap the backfilling body and roof，and the compression amount of the backfilling body are the key factor affecting surface subsidenceTo raise the ratio of backfilling body height to mining height is the most effective way to reduce the subsidence factors in backfilling miningThe subsidence control effect can be also improved to a certain extent by increasing the strength of the backfilling bodyKey words：backfilling mining；surface subsidence；influencing factors；ratio of backfilling；煤矿通风瓦斯在燃气轮机中的催化燃烧特性尹 娟 翁一武(1上海交通大学机械与动力工程学院，上海20003摘 要：在不同进口温度、工作压力和当量比条件下，研究了煤矿通风瓦斯气在燃气轮机催化燃烧室内部的燃烧特性，对数值模拟结果与试验结果进行了对比，并分析了催化燃烧对超低浓度瓦斯气性能的影响结果表明：增加甲烷浓度(或当量比)可促进超低浓度甲烷的催化燃烧；提高催化燃烧室进I：温度或工作压力可相应提高煤矿通风瓦斯燃气轮机系统的效率关键词：燃气轮机；煤矿通风瓦斯；超低浓度瓦斯气；催化燃烧特性；数值计算Characteristics of Coa I Mine Ventilation Air Methane Combusted by Catalytic in Gas TurbineAbstract：The combustion characteristics of the coal mine ventilation air methane in a catalytic combustor of a gas turbine were investigated under different in lettem peratures，operating pressures and equivalent ceratiosThe simulation results were compared with the experiment results and the influence factors of catalytic combustion that could affect the activity of ultralow concentration methane were foundResults show that the catalytic combustion of the Methane with ultra-low concentration could be a rated by increasing its concentration(or valence ratio)The efficiency of the gas turbine system using the coalmine ventilation air methane could be increased raising the temperature or operating pressure at the in let of the catalytic combustor充填开采的协作支撑系统及其力学特征余伟健，冯涛，王卫军，李石林湖南科技大学煤矿安全开采技术湖南省重点实验窀，湖南湘潭. .湖南科技大q-能源与安全工程学院，湖南湘潭411201)摘要一针对“三下”煤炭充填开采引起的岩层移动与控制问题，根据充填开采特点，重点考虑充填体、煤柱和承重岩层的共同协调作用，提出“充填体+煤柱+承重岩层”协作支撑系统这一概念。运用岩石力学、围岩控制原理及其相关理论分别分析充填体的支护作用机制、煤柱的支撑条件、协作支撑系统的力学作用过程及稳定条件，研究结果表明：允填体的支护作用体现在对煤柱的侧向加同和对承重岩层的竖向支撑：充填体对煤柱的侧向应力应满足一定条件才能保证煤柱对上覆岩层产生较大的支撑力；“充填体+煤柱+承重岩层”协作支撑系统的力学作用过程分别经历了上覆岩层的加速下沉、加速或匀速下沉、减速下沉、平稳这4个主要阶段，分析得到“充填体+煤柱+承系岩层”协作支撑系统的稳定条件，并发现充填体的压实度和充填率越大，对形成和提高“充填体+煤柱+承重岩层”协作控制体系的整体性、改善受力环境就越有利最终能最大限度地控制岩层移动及地表沉降。最后，将“充填体+煤柱+承藿岩层”协作支撑系统理论应用于周源山煤矿的“三下”充填开采当中，结果表明，在进行充填设计时，至少应将充填体的压实度Dr提高到08以上，充填率R控制在90以上，才能将地表沉降控制到最小值，该结果与数值计算结果较为接近。Abstract：Aiming at subject of strata movement and control caused by the mining with filling under buildings，railway sand waterBodies threeunderground)，achieving together action of backfilling ，coal pill rand roof load bearing r stratum was emphasized，and the conception of coordination support systems is put forwardRock mechanics， control rinciple and others correlation theory are applied to analyze the supporting mechanism of backfilling，the supporting conditions of coal pill a rand the process of mechanics action and the stability condition of the coordination support systemsResearch shows that the supporting mechanism of backfilling act as the horizontal reinforce action at coal pillar and the vertical supporting action at roof loadbearing rock stratum：the horizontal reinforce action should meet the controlled condition for the purpose of greater holding power which coal pill are ffect on overburden；The mechanics action of the coordination support systems with backfilling，coal pillar and roof loadbearing rock stratum experience fain stages including the accelerated subside of overburden，uniforms peed subside，decelerated subside and steady in proper orderMoreover，it is found that the degree of compaction and the packing fractionbigger，these have moreadvantageous to integrity and bearing strength environment of the coordination support systems，and strata movement and ground subsidence can control as much as possibleAt last，the coordination support systems theory is applied in the threeunderground mining with filling of Zhouyuanshan mineIn order to reduce ground subsidence as much as possible，analytic result indicated that the degree of compaction(Dr)of backfilling raise to above 08，and the packing fraction(Ff)control above 90迎采动面沿空掘巷围岩变形规律及控制技术王猛，柏建彪，王襄禹，徐营，郭永红，曹金龙摘要 :迎采动面沿空掘巷经历邻近工作面侧向基本顶断裂、转动及稳定的全过程动压影响后，巷道围岩将产生大变形、维护困难。采用理论分析、数值计算和现场试验研究迎采动面沿空掘巷围岩变形规律和控制技术，得到该类巷道受邻近工作面采动影响后围岩呈现非对称变形，窄煤柱和顶板变形剧烈，提出提高窄煤柱和顶板支护强度使围岩形成有效承载体是保持迎采动面沿空掘巷整体稳定的关键，据此提出了合理的围岩控制技术：1)合理确定窄煤柱宽度，使邻近工作面采动影响稳定后巷道处于应力降低区；2)高强度大延伸率锚杆控制围岩变形；3)加强窄煤柱、顶板支护，提高关键部位承载能力。棋盘井煤矿工程实践表明，该技术有效控制了该类巷道围岩变形量，取得了良好效果。The Surrounding Rock Deformation Rule and Control Technique of the Roadway Driven along Goaf and Heading for Adjacent Advancing Coal Face。Abstract ：The road way driven along goaf and heading for adjacent advancing coal face was in full procedure influenced by the dynamic pressure occurred by the lateral main roof broken，turned and stabilized of the upper sectional coal face，the surrounding rock would occur large deformation and difficult to maintainThis paper researched the surrounding rocked formation rule and control technique by theoretical analysis，numerical calculation and field testThe result shows that this roadway would occur asymmetrical deformation，small coal pill a rand roof deformed greatly，improve support strength of small coal pill arand roof remain the roadway stableAccording to the research，the better supporting technology is shown as follows：1)Reason ably determine the width of small coal pillar，kept road way in stressdecreasingzone2)High strength and large elongation anchor controlled deformation of surrounding rock：3)Reinforced support of the small coal pillar and roof to improve the carrying capacity of key partsAccording to the engineering application in Minet the sup。porting technology effectively controlled the deformation of surrounding rock of roadway，and achieve desults急倾斜矿体分步充填开采对地表沉陷的影响丁德民，马凤山，张亚民，杨长祥，贾高华(1中国科学院地质与地球物理研究所工程地质力学重点实验室，北京100029I2金川集团有限公司三矿区，甘肃金昌 737100)摘要：为了研究金川镍矿急倾斜矿体利用充填法开采出现的地面沉陷问题，基于三矿区多期地表岩移GPS监测数据，阐明了F。，以东地下开采引起地表岩体移动的总体显现特征，在此基础上，分析了出矿量和地袁沉陷盆地体积之间的关系，运用ADINA软件，对不同充填开采条件下围岩应力场、位移场变化特征进行了探讨研究结果表明：三矿区地表沉陷盆地正在形成，其几何形态明显受到控矿断层的控制；当矿体几何形态和采矿方式较稳定时，地表沉陷盆地体积(丁)和矿山出矿量(Q)在一定时段内具有一定的相关关系；影响地表沉陷的主要因素是从开采进路形成至充填阶段的围岩收敛变形和间柱的采断；多进路开采较单进路开采条件下的地表沉陷量大关键词：急倾斜矿体；充填开采；地表沉陷；步长；围岩收敛Effect of MultiStep Back Filling of Steep Orebody on Ground Surface SubsidenceAbstract：Aiming at the problem of surface subsidence induced by underground backing of steep orebody in Jinchuan Nickel mine，we elucidate the current status of ground surface movement in No3mining area on the east of F17 based on GPS monitoring data，studied the correlativity between the extracted ore tonnage and the volume of surface subsidence basin，and analyzed the development characteristics of ground stress field and displace mentfield of surrounding rock unde