Coal Mining and Designing Department, Tiandi Science and Technology Co. , Ltd.
Hanjiawan Coal Co. , Ltd. , Shaanxi Shaanbei Mining Group

为了实现受房柱式采空区影响的浅埋深、近距离煤层群矿井的安全开采,依据韩家湾三盘区2-2煤层房采区地质采矿条件,采取了“采空区钻探+漏失量观测+空区积水探测+三维激光扫描”综合探测技术,探测结果表明,三盘区2-2煤房柱式采空区精查区域的顶板裂隙发育程度低,顶板岩层较为完整,煤柱及房仓参数为采7m留8m的采煤方式,部分区域采空区积水高度0.15~0.35m。同时基于实验室测试结果,应用相关理论对2-2煤现状下残留煤柱、1-2煤长壁工作面蹬空扰动2-2煤煤柱的稳定性进行了分析,研究表明:三盘区2-2煤不同房柱式开采尺寸的残留煤柱现状下暂时稳定;1-2煤长壁工作面蹬空2-2煤房柱式空区开采的支承压力影响2-2煤残留煤柱不能保持稳定;“先采下组煤层,利用矿山压力对2-2煤残留煤柱破坏后,再在扰动破坏后的房柱式采空区上实施上组煤蹬空开采”的方案是技术可行的。

In order to safely mine the shallow contiguous coal seams affected by the room-pillar goaf, based on the geological and mining conditions of2 -2 coal seam using room-pillar mining method in third panel, Hanjiawan Coal Mine, using integrated detection technique of “goaf drilling+leakage observation+goaf water detection+dimensional laser scanning”, it is obtained that roof crack development degree of the room-pillar goaf is low, roof strata are relatively complete, the parameters of coal pillar and warehouse are 7 m and 8 m, respectively; and the height of goaf water in some areas is 0. 15~0. 35 m. Based on laboratory test results, stability of residual coal pillar under the current condition of 2-2 coal and the stability of disturbed 2-2 coal pillar under the over-goaf mining of1 -2 coal longwall working face are calculated and analyzed by relevant theories. Results show that residual coal pillars of different room and pillar mining sizes of coal 2-2 are temporarily stable under the current situation. The abutment pressure of 1-2 coal longwall face mining over 2-2 coal room pillar goaf affects 2-2 coal residual pillar can not keep stable; the mining scheme of “mining group coal seam first, using mine pressure to destroy the residual coal pillars of coal2 -2, and then implementing the house-pillar type goaf after the upper group coal push off disturbance destruction” is technically feasible.

国家自然科学基金项目(52174079);中煤科工开采研究院有限公司科技创新基金(KCYJY-2023-MS-02)

高 超, 霍军鹏, 邓伟男, 等. 房柱采空区影响的近距离煤层群开采技术研究 [J].煤炭工程, 2023, 55(12): 39-45.