高原山区复杂地质条件下矿压规律及支护阻力研究

Research on Pressure rule and support resistance under complex geological conditions on Plateau mountain

研究高原山区复杂地质条件下炮采工作面矿压规律,通过对云南恩洪煤矿1903、2904炮采工作面采用理论分析、现场观测的方法,对工作面初次来压、周期来压、超前压力范围影响,得出恩洪煤矿炮采工作面老顶初来压步距平均20.7m,最大来压强度为86.3kN,平均来压为63.9kN,初次来压动载系数2.14;周期来压步距平均7.6m,平均来压强度53.3kN,动载系数1.81,为来压不明显顶板。根据分析结果提出支护优化方案,为工作面安全高效开采提供科学依据。

Study on the plateau mountain complex rock pressure of working face under the geological conditions of blasting, through to theYunnan Enhong coal mine 1903, 2904 blastingface by means of theoretical analysis, field observations, on the face of initial pressure, cyclepressure, advance pressure range, the Enhong coal mine blasting mining face roof early pressure to step away from the average 20.7m, themaximum compressive strength is 86.3kN, the average pressure is 63.9kN, the initial pressure of the dynamic load coefficient of 2.14; periodicweighting distance average 7.6m, the average compressive strenglh of 53.3kN, the dynamic load coefficient of 1.8 l, as the roof pressure is notobvious. According to the analysis results, the optimization scheme of support is put f~＊l^vard, which provides a scientific basis for safe andefficient mining of face.