工业广场密集建筑物下变采(留)宽条带开采技术  

Application of strip pillar mining technology under dense constructions within industrial square

作　　者：郭文兵[1,2] 李亚涛 刘大超[1] 

机构地区：[1]河南理工大学能源科学与工程学院,河南焦作454000 [2]煤炭安全生产河南省协同创新中心,河南焦作454000

出　　处：《河南理工大学学报（自然科学版）》2017年第6期8-14,共7页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(51374092);国家自然科学煤炭联合基金重点资助项目(U1261206)

摘　　要：为研究煤矿工业广场密集建筑物下压煤开采技术,以平煤七矿开采为例,依据实际采煤条件及条带开采理论,通过理论计算,确定变采(留)宽条带小工作面开采方案,通过概率积分法预计、数值模拟,研究了条带小工作面重复采动的地表下沉盆地的移动变形规律,得出地表移动和变形值及其对地表建(构)筑物的影响情况。结果表明,变采(留)宽条带小工作面开采后,采出率为65.5%,地表最大下沉值为429.3 mm,下沉系数为0.133,地表主要建筑物损害程度在Ι级之内,采空区中心向下山方向偏移距离d为26 m,最大下沉角为85.6°。条带小工作面开采能够在提高回采率的基础上很好地控制覆岩变形与地表沉陷,解决了保护地表建筑物与解放工业广场煤柱的矛盾,为资源枯竭煤矿工业广场煤柱回收在技术和理论上提供了参考。To extract coal under dense constructions within industrial square in No. 7 coal mine of Pingdingshan Coal Group,based on strip pillar mining theory and coal mining conditions,small variable width panel with wide strip pillar mining plan was established by using theoretical calculation and schemes comparison. Combined probability integral method analysis and numerical simulation method,the displacement and deformation laws of surface subsidence basin under repeated mining conditions of small strip pillar mining were studied,surface movement and deformation valves and the influence on the constructions within industrial square was attained. The result shows that the recovery ratio is 65. 5%,the maximum subsidence of the surface is429. 3mm,the subsidence coefficient is 0. 133 and the surface building damage grade is within grade I when small variable width panel with wide strip pillar mining method was used. This method could control the overlying strata deformation and surface subsidence better with increasing recovery ratio,contradiction of protecting surface constructions and extracting more coal pillar could be solved either,it has a good prospect of popularization and application.

关 键 词：工业广场 条带开采 地表沉陷 变采(留)宽 建(构)筑物下采煤 

分 类 号：TD823.83[矿业工程—煤矿开采]