摘要
宽大护巷煤柱浪费煤炭资源且容易引起矿井灾害。以支承压力分布规律为依据,确定窄煤柱沿空掘巷为大采高条件下最佳布巷方式。基于覆岩大结构的"弧形三角板"B块失稳,是造成窄煤柱沿空护巷控制失败的主要原因,提出定向断裂切顶卸压围岩控制原理,并建立切顶高度数学模型。工业试验表明,切顶卸压窄煤柱沿空送巷回采期间围岩变形量满足下区段工作面生产要求,取得较好的经济技术效果,具有广泛的推广应用价值。
Large coal pillar wastes coal resources, easy to cause the mine disaster. Regarding abuanent pressure distribution law as the basis, it is determined that the narrow pillar of roadway driving along goal is the best cloth lane under large mining roadway. The instability of ＂arc triangle plate＂ B block based on overburden large structure is the main reason cans- ing the failure of narrow coal pillar gob- side entry retaining control. The directional fracture cutting top unloading and sur- rounding rock control principle is put forward and the mathematical model of roof cutting height is established. The industrial tests show that, the deformation of surrounding rock in top cutting relief of narrow coal pillar god roadway can meet the requirements of production for the following working face. Better economic and technological benefits have been achieved and it can he widely popularized and applied.
出处
《工业安全与环保》
北大核心
2014年第5期45-47,共3页
Industrial Safety and Environmental Protection
关键词
沿空掘巷
窄煤柱
切顶卸压
定向断裂
driving roadway along goal narrow coal pillar cut the top relief directional fracture
