矿业安全与环保
礦業安全與環保
광업안전여배보
MINING SAFETY & ENVIRONMENTAL PROTECTION
2013年
3期
43-46
,共4页
浅埋深%压力拱%风积沙%PFC2D%矿山压力
淺埋深%壓力拱%風積沙%PFC2D%礦山壓力
천매심%압력공%풍적사%PFC2D%광산압력
shallow coal seam%pressure arch%aeolian sand%PFC2D%ground pressure
针对杨家村矿的地质条件,利用PFC2D数值计算软件,建立了一个长130 m、高100 m,分别为煤、细粒砂岩、粉砂岩、风积沙岩层的模拟模型,对浅埋深厚松散层煤层的矿压显现规律进行了分析.研究发现:回采过程中岩层的结构依次为拱结构—悬臂梁结构;矿压显现规律为拱内岩石自重—拱内岩石自重+风积沙自重(初次来压)—悬臂梁破断角下方的岩石自重(平时的矿压)—整个破坏范围内岩石的自重+破断范围内风积沙自重(周期来压).
針對楊傢村礦的地質條件,利用PFC2D數值計算軟件,建立瞭一箇長130 m、高100 m,分彆為煤、細粒砂巖、粉砂巖、風積沙巖層的模擬模型,對淺埋深厚鬆散層煤層的礦壓顯現規律進行瞭分析.研究髮現:迴採過程中巖層的結構依次為拱結構—懸臂樑結構;礦壓顯現規律為拱內巖石自重—拱內巖石自重+風積沙自重(初次來壓)—懸臂樑破斷角下方的巖石自重(平時的礦壓)—整箇破壞範圍內巖石的自重+破斷範圍內風積沙自重(週期來壓).
침대양가촌광적지질조건,이용PFC2D수치계산연건,건립료일개장130 m、고100 m,분별위매、세립사암、분사암、풍적사암층적모의모형,대천매심후송산층매층적광압현현규률진행료분석.연구발현:회채과정중암층적결구의차위공결구—현비량결구;광압현현규률위공내암석자중—공내암석자중+풍적사자중(초차래압)—현비량파단각하방적암석자중(평시적광압)—정개파배범위내암석적자중+파단범위내풍적사자중(주기래압).
To counter the geological conditions of Yangjiacun Mine, a 130m-long and 100m-high simulation model composed of coal, fine-grained sandstone, siltstone and aeolian sandstone was built by using PFC2D numerical calculation software, and the analysis was conducted on the ground behavior law of the loose coal seam with shallow depth. It was found in study that the structure of the rock strata in the mining process is the arch structure-cantilever structure; the ground behavior law is the rock weight within the arch-the rock weight within the arch+the weight of aeolian sand (first weighting)-the weight of rock under the braking angle of the cantilever beam (the usual ground pressure)-the weight of rock in the whole broken scope + the weight of aeolian sand in the breaking scope( the periodical weighting).
