CAJ | 학술논문

为解决深井大采高工作面留设大煤柱导致回收率低的难题，运用理论计算、数值分析及现场工程实测的方法，研究了深井大采高工作面开采条件下不同煤柱宽度时煤柱两侧塑性区分布和采掘扰动对巷道变形的影响，得到窄煤柱的合理尺寸。结果表明：确定合理煤柱尺寸时应充分考虑煤柱自身稳定性和采掘影响下巷道围岩变形量；掘进期间沿空掘5~6m宽煤柱时破碎严重，煤柱宽度至少7 m才能达到自身稳定要求，而回采期间煤柱宽度至少需8 m，此时巷道围岩变形量相对较小，综合确定煤柱宽度8 m为最优方案。现场监测表明：11030工作面进风平巷两帮最大变形量为1210 mm，顶底板最大变形量为620 mm，能够满足安全生产要求。
위해결심정대채고공작면류설대매주도치회수솔저적난제，운용이론계산、수치분석급현장공정실측적방법，연구료심정대채고공작면개채조건하불동매주관도시매주량측소성구분포화채굴우동대항도변형적영향，득도착매주적합리척촌。결과표명：학정합리매주척촌시응충분고필매주자신은정성화채굴영향하항도위암변형량；굴진기간연공굴5~6m관매주시파쇄엄중，매주관도지소7 m재능체도자신은정요구，이회채기간매주관도지소수8 m，차시항도위암변형량상대교소，종합학정매주관도8 m위최우방안。현장감측표명：11030공작면진풍평항량방최대변형량위1210 mm，정저판최대변형량위620 mm，능구만족안전생산요구。
In order to solve the problem of low recovery of wide coal pillar at large height mining face in deep mine, the effect of plastic area distributions of the two sides of coal pillar and driving distur-bance on the roadway deformation under conditions of different width of narrow coal pillar when min-ing at large height mining face in deep mine have been studied by theoretical calculation, numerical analysis and site engineering measurement. Thus the reasonable width of narrow coal pillar is deter-mined. The results show that the stability of coal pillar and the deformation of roadway surrounding rock affected by driving should be taken into consideration to determine the reasonable width of coal pillar. The coal pillar is seriously crushed when its width of roadway driving along goaf is 5 to 6 m while driving, but it can achieve stability when its width is not less than 7 m. The width needs no less than 8 m while mining, and consequently the deformation of floor and coal pillar is less severe. So it is the optimal decision when the width of coal pillar is 8 m. field monitoring indicates that,the maximum deformation of the two sides of intake airflow roadway in 11030 workface is 1 210 mm, and that of roof and floor is 620 mm, which can meet the requirements of safety production.