综采工作面终采位置优化与应力调控护巷技术研究

doi:10.11799/ce202602002

摘要/Abstract

摘要：

在工作面末采阶段，综采工作面前方超前支承压力将对前方集中大巷持续产生不利影响，引起大巷围岩应力集中，甚至增加大巷围岩失稳风险。因此，以山西崖坪煤矿22104工作面为工程背景，首先基于关键层理论，分析了顶板破断距及覆岩结构特征；同时利用FLAC^3D模拟了工作面采动渐进影响下集中大巷围岩变形破坏过程，将保护煤柱宽度降低至55m左右。为了提供足够的安全冗余，提出了一种由“另掘卸压巷、两翼预注浆加固”组成的卸-注联合加固技术，同时实现卸压巷卸压与煤岩体强化控压，改善大巷所处应力环境。模拟了“卸压”“卸-注”两种情况下的大巷变形破坏情况，结果表明，该加固技术能够有效降低大巷围岩失稳风险。同时将该方案进行了现场应用，在工作面停采3月后，大巷仍能保持自身稳定，应用效果良好。

关键词: 超前支承压力, 集中大巷, 注浆加固, 应力调控, 围岩控制

Abstract:

Cantilever beam structure is a type of overlying strata structure commonly found in comprehensive mining working face, which often results in higher stress concentrations in the coal pillar near the mining stop line. The failure of coal pillar leads to the transfer of front abutment pressure to the main roadway, thereby increasing the risk of destabilization of the surrounding rocks in the main roadway. Taking the 22104 working face of the Yaping Coal Mine as the engineering background, this paper first analyzes the transfer process of front abutment pressure influenced by the cantilever beam structure based on key stratum theory. Subsequently, the deformation and failure processes of the surrounding rock in the main roadway under the gradual influence of mining were simulated using FLAC^3D, which reduces the width of the coal pillar to about 55m. In order to provide sufficient safety redundancy for the main roadway, a combined reinforcement technology consisting of “excavating another pressure relief roadway and pre-grouting reinforcement on both sides” is proposed, which simultaneously realizes the pressure relief by the roadway and the pressure control by the reinforcement of the coal and rock, so as to improve the stress environment of the main roadway. The deformation and failure of the main roadway under the two programs of “pressure relief” and “pressure relief-pre grouting” were simulated, and the results showed that the reinforcement technology can effectively reduce the risk of failure of surrounding rocks in the main roadway. The program was applied in the field, and the main roadway could still maintain its own stability after 3 months of mining stoppage, which provided a guarantee for the safe mining of the mine.

中图分类号:

TD323

解志朝, 郭江峰, 刘子硕, 韩立军, 高　鹏.

综采工作面终采位置优化与应力调控护巷技术研究 [J]. 煤炭工程, 2026, 58(2): 8-15.

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