神东矿区大断面空巷群泵送支柱支护技术研究与应用

doi:10.11799/ce202210007

摘要/Abstract

摘要： 为解决综采面过大断面空巷群的安全生产难题，对国内外过空巷技术进行了调研研究，分析了跳采、充填、常规补强支护面临的技术问题，研究了空巷群围岩变形失稳及泵送支护机理，提出了泵送支护和锚杆索支护相结合的空巷群治理方案。通过数值模拟、理论计算，确定了空巷采用“锚索+W钢带+帮网+泵送支柱”的设计方案。在乌兰木伦煤矿的工业性试验表明，过空巷期间工作面及两平巷均未发生底鼓，空巷内共布置10个测点，最大下沉量12cm以内，泵送支柱被截割超过直径2/3时，才发生失稳垮塌，说明泵送支柱具有抗矿压动载、大变形让压、稳定性好、易于切割的特点，满足大断面空巷围岩控制需要。

关键词: 空巷群, 泵送支柱, 大变形让压, 大断面空巷, 围岩控制

Abstract: In order to solve the safety problem of large section abandoned roadway in fully mechanized mining face, the research on abandoned roadway supporting technology at home and abroad was carried out. The technical problems caused by jump mining, filling and conventional reinforcement support were analyzed. The deformation and instability of surrounding rock and pumping support mechanism of abandoned roadways were analyzed.The treatment combining pumping support and anchor cable support was put forward. Through numerical simulation and theoretical calculation, the design of anchor cable &W steel belt &wall net & pumping pillar around goaf is determined. Wulanmulun colliery industrial test showed that, both working face and roadways floor heave didn’t occur during cutting through abandoned roadways. Within a total of 10 measuring points arranged, the maximum subsidence is less than 12cm. When pumping pillar has been cut more than 2/3 diameter, buckling collapse occurred. It shows that the pumping pillar has the characteristics of anti-dynamic load, large deformation, good stability and easy cutting, which can meet the needs of surrounding rock control of large section abandoned roadway.

中图分类号:

TD353

杨俊彩. 神东矿区大断面空巷群泵送支柱支护技术研究与应用[J]. 煤炭工程, 2022, 54(10): 31-37.

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