煤矿开采
煤礦開採
매광개채
COAL MINING TECHNOLOGY
2014年
6期
54-59,16
,共7页
采动影响%沿空掘巷%煤柱宽度%塑性破坏区%应力分布
採動影響%沿空掘巷%煤柱寬度%塑性破壞區%應力分佈
채동영향%연공굴항%매주관도%소성파배구%응력분포
mining influence%driving roadway along gob%coal-pillar width%plastic failure zone%stress distribution
以成庄矿4310综放面4220沿空掘巷为研究对象，采用理论计算和数值模拟分析方法对沿空掘巷小煤柱宽度的合理留设进行深入研究，分析了不同煤柱宽度的塑性破坏区范围和煤柱区域的应力分布特征，进而结合现场实际地质生产条件，综合确定煤柱宽度为10m。根据现有巷道支护理论，确定了4220副巷围岩变形控制技术，并数值模拟分析采动影响沿空掘巷围岩变形特征，进而制定了高预应力高强度锚杆索支护方案与支护参数。4220副巷支护试验结果表明：高预应力高强度锚杆索支护技术对沿空掘巷服务期间围岩变形控制效果显著，提高了成庄矿煤炭资源采出率，为矿井后续沿空掘巷的使用提供技术依据。
以成莊礦4310綜放麵4220沿空掘巷為研究對象，採用理論計算和數值模擬分析方法對沿空掘巷小煤柱寬度的閤理留設進行深入研究，分析瞭不同煤柱寬度的塑性破壞區範圍和煤柱區域的應力分佈特徵，進而結閤現場實際地質生產條件，綜閤確定煤柱寬度為10m。根據現有巷道支護理論，確定瞭4220副巷圍巖變形控製技術，併數值模擬分析採動影響沿空掘巷圍巖變形特徵，進而製定瞭高預應力高彊度錨桿索支護方案與支護參數。4220副巷支護試驗結果錶明：高預應力高彊度錨桿索支護技術對沿空掘巷服務期間圍巖變形控製效果顯著，提高瞭成莊礦煤炭資源採齣率，為礦井後續沿空掘巷的使用提供技術依據。
이성장광4310종방면4220연공굴항위연구대상，채용이론계산화수치모의분석방법대연공굴항소매주관도적합리류설진행심입연구，분석료불동매주관도적소성파배구범위화매주구역적응력분포특정，진이결합현장실제지질생산조건，종합학정매주관도위10m。근거현유항도지호이론，학정료4220부항위암변형공제기술，병수치모의분석채동영향연공굴항위암변형특정，진이제정료고예응력고강도묘간색지호방안여지호삼수。4220부항지호시험결과표명：고예응력고강도묘간색지호기술대연공굴항복무기간위암변형공제효과현저，제고료성장광매탄자원채출솔，위광정후속연공굴항적사용제공기술의거。
Applying theoretical calculation and numerical simulation to researching rational width of small coal-pillar along gob in 4310 full-mechanized caving mining face, plastic zone range and stress distribution characteristic of coal-pillar under different coal-pillar widths was analyzed. Combining actual geological and mining condition, rational coal-pillar width was determined to be 10m. According to current supporting theory, deformation control of surrounding rock of 4220 roadway was selected. By numerically analyzing deforma-tion characteristic of roadway influenced by mining, supporting projection of anchored bolt and cable with high pre-stress and high strength and supporting parameters were obtained. Practice showed that supporting effect of the supporting project was obvious which im-proved coal mining ratio and provided reference for later driving roadway along gob.
