摘要
新疆俄布煤矿下1煤层顶板为特厚坚硬岩层组,上覆薄砂砾石层,有3个含水层且地表水系发育.通过RFPA数值模拟研究特厚坚硬顶板的破断、冒落特征,说明上覆厚硬岩层组有整体破断的可能性,极易在工作面因支护阻力不足而滑落失稳,产生台阶下沉.在此基础上,结合覆岩中无稳定黏土隔水层的地质条件,确定选用短壁综采工艺进行保水采煤.并用ANSYS三维数值模拟确定了工作面长度和煤柱宽度及推进范围,防止工作面顶板冒落带和裂隙带波及煤系砂岩、标准砂岩和第四系松散层含水体.现场工业性试验表明,俄布煤矿保水采煤取得了成功.
The roofs of Down 1 coal seam in Ebu coal mine are hard and thick shallow strata covered with thin sand-gravel layers, among which there are three aquifers with surface water well developed in the mining area. The roof rupture and falling is simulated by RFPA. The resuits show that the hard and thick strata are quite possible to be ruptured as a whole. Because there is no stable aquiclude in the overlying strata, the short-wall mining method is chosen to mine coal with water conservation. Based on this, the optimized coalface length and pillar width as well as the advance length are achieved by the ANSYS 3D numerical simulation to prevent the falling zone and crack zone from reaching the coabseries sandstone, standard sandstone and Quaternary unconsolidated water-contained stratum. The practice shows that the coal mining with water conservation is successful in Ebu coal mine.
出处
《采矿与安全工程学报》
EI
北大核心
2006年第1期62-65,共4页
Journal of Mining & Safety Engineering
基金
国家自然科学基金项目(50374065)
国家杰出青年科学基金项目(50225414)
关键词
保水采煤
厚硬岩层组
数值模拟
破断与冒落
coal mining with water conservation
hard and thick strata
numerical simulation
rupture and falling
