江西煤炭科技
江西煤炭科技
강서매탄과기
JIANGXI COAL SCIENCE & TECHNOLOGY
2015年
3期
100-102
,共3页
耦合让压%围岩变形%支护%参数设计
耦閤讓壓%圍巖變形%支護%參數設計
우합양압%위암변형%지호%삼수설계
coupling yielding%surrounding rock deformation%support%parameter design
由掘进巷道围岩变形、及锚杆断裂现象,分析巷道的破坏形式为典型的留煤柱沿空掘巷巷道破坏显现。经理论计算,选取耦合让压应力显示锚杆,规格为Φ20mm ,L 2500mm ;顶锚杆排间距1000mm ×920mm ;帮锚杆排间距1000mm ×1000 m m ,采用新支护系统后,顶板与两帮最大移近量分别为50mm、90mm ,巷道围岩变形得到有效控制。
由掘進巷道圍巖變形、及錨桿斷裂現象,分析巷道的破壞形式為典型的留煤柱沿空掘巷巷道破壞顯現。經理論計算,選取耦閤讓壓應力顯示錨桿,規格為Φ20mm ,L 2500mm ;頂錨桿排間距1000mm ×920mm ;幫錨桿排間距1000mm ×1000 m m ,採用新支護繫統後,頂闆與兩幫最大移近量分彆為50mm、90mm ,巷道圍巖變形得到有效控製。
유굴진항도위암변형、급묘간단렬현상,분석항도적파배형식위전형적류매주연공굴항항도파배현현。경이론계산,선취우합양압응력현시묘간,규격위Φ20mm ,L 2500mm ;정묘간배간거1000mm ×920mm ;방묘간배간거1000mm ×1000 m m ,채용신지호계통후,정판여량방최대이근량분별위50mm、90mm ,항도위암변형득도유효공제。
To prevent the surrounding rock deformation and bolt fracture in dynamic - Pressure -influenced roadway ,the author suggests the application of coupling yielding support with bolt specification of Φ 20 mm and L 2500 mm ,roof bolts spacing of 1000 mm × 920 mm and rib bolts spacing of 1000 mm × 1000 mm ,which would effectively control the surrounding rock deformation with maximum convergence of 50 mm in roof and 90 mm in two ribs .