工作面面宽对煤层群开采瓦斯卸压运移“三带”范围的影响

发布时间：2018-03-02 03:02

本文关键词： 瓦斯卸压运移“三带” 工作面面宽煤与瓦斯共采绿色开采　出处：《采矿与安全工程学报》2017年01期 　论文类型：期刊论文

【摘要】：为了进一步完善煤与瓦斯共采理论,促进煤与瓦斯双能源安全高效开采,基于关建层理论,采用相似模拟、数值模拟和理论分析的方法,研究了工作面面宽对煤层群开采瓦斯卸压运移"三带"范围的影响规律。结果表明:在不同工作面面宽条件下,覆岩关键层的移动、破坏形态将对瓦斯卸压运移"三带"范围起到明显的影响作用。如果随着工作面面宽的加大导致覆岩关键层完全破断,则导气裂隙带高度将突增至该关键层上方一层未发生破断的关键层之下,若关键层未完全破断,则导气裂隙带高度稳定在该关键层之下;卸压解吸带高度止于上覆岩层中尚未破断且下方存在离层裂隙的关键层之下,其最大高度止于主关键层之下。研究结果的可靠性得到了工程实测的验证。
[Abstract]:In order to further improve the theory of coal and gas co-mining and promote the safe and efficient mining of coal and gas, the similarity simulation, numerical simulation and theoretical analysis are adopted based on the theory of closed and built beds. The influence of face width on the range of "three zones" of gas relief migration in coal seam group mining is studied. The results show that under different face width conditions, the key strata of overburden rock are moved. The failure pattern will have an obvious effect on the range of "three zones" of gas relief migration. If the key strata of overburden rock are broken completely with the increase of face width, The height of the gas conduction fracture zone increases to below the critical layer above the critical layer, if the critical layer is not completely broken, the height of the gas conduction fracture zone is stable below the critical layer. The height of the pressure relief desorption zone is below the critical layer which is not broken in the overburden strata and there is a fissure in the layer below, and the maximum height of the desorption zone is below the main critical layer. The reliability of the research results has been verified by the engineering measurements.
【作者单位】：中国矿业大学(北京)资源与安全工程学院煤炭资源与安全开采国家重点实验室;
【基金】：煤炭资源与安全开采国家重点实验室开放课题项目(SKLCRSM16KFB08);煤炭资源与安全开采国家重点实验室大学生科技创新计划项目(SKLCRSM16DC03) 国家自然科学基金项目(51474220) 中央高校基本科研业务费专项资金项目(2011QZ03)
【分类号】：TD712.6

【相似文献】