China Coal Research Institute

针对升富煤矿周边煤矿工作面开采对其井筒安全影响问题,通过理论分析、现场实测和经验类比相结合的研究方法,划定了井筒保护煤柱范围,分析了工作面正常开采、区段煤柱开采和井筒煤柱压覆区域不开采三种方案下井筒不同位置处的移动与变形情况,提出了井壁采动损害等级、损坏分类及结构处理方法的评价指标分类,评价了采动影响下井筒安全稳定状况。结果表明:3煤01工作面正常开采和井筒煤柱压覆区域不开采两种情况下,主、副斜井不受采动影响,风井分别在距地面[0,50]m范围和[0,41]m范围为Ⅰ级(轻微)损坏,对井筒安全影响较小;若区段煤柱也开采,最不利情况下,主斜井在距井口[0,70]m和(70,250]m范围分别为Ⅱ级(一般)损坏和Ⅰ级(轻微)损坏,风井在距地面[0,33]m、(33,58]m和(58,90]m范围分别为Ⅲ级(较重)损坏、Ⅱ级(一般)损坏和Ⅰ级(轻微)损坏,风井损坏等级最高为Ⅲ级,将影响风井正常使用。

The shafts safety of Shengfu Coal Mine was influenced by the mining of surrounding coal mine. In order to evaluate the shaft safety, theoretical analysis, field measurements and empirical analogy were used. Firstly, the ranges of protective coal pillars for shafts were delimited. Then the movement and deformation at different positions of the shafts for three schemes, including the working face mined normally, the district coal pillar mined, and the shaft overburden area not mined, were predicted. Finally, the classification of the mining damage grade, damage classification and structural treatment method of the shaft were proposed, the safety and stability of the shaft affected by mining was evaluated. The results showed that the main and auxiliary inclined shafts were not affected by the mining and the ventilation shaft was damaged at level I (slight) in the range of [0, 50] m and [0, 41] m from the ground when the working face in the No. 3 coal seam was normally mined,thus there was little impact on the safety of the shafts. But when the coal pillar was also mined and in the most unfavorable case, the main inclined shaft would be damaged at level Ⅱ (general), level Ⅰ (slight) in the range of [0, 70] m and (70, 250) m from the wellhead, respectively, and the ventilation shaft would be damaged at level Ⅲ (severe), level Ⅱ(general) and level Ⅰ (slight) in the range of [0, 33] m, (33, 58) m and (58, 90] m, respectively, thus the highest level III damage to the ventilation shaft, which would affect the normal use of the ventilation shaft.

中煤科工科技创新创业资金专项项目(2019-ZD004);煤科院科技发展基金项目(2022CX-II-03)

郭文砚,张俊英,刘志飞,等.采动影响下井筒安全评估研究[J].煤炭工程,2024,56(5):18-23.