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一、绪言 杨桥矿区位分宜县及宜春县北部,华夏系天目山褶皱群西段、新华夏第二巨型隆起带西部边缘、武功山——九岭二区域性东西向构造带之间的枫林桥复向斜内,东西长42公里、南北平均宽约10公里,总面积约420平方公里。出露的主要地层为:白垩系、三迭系下统大冶组厚689米以上、二迭系(上统:长兴组厚50—100米,龙潭组厚499米;和下二迭阳新统)。煤系为龙潭组海陆交替相沉积,自上而下四分为:王潘里段、狮子山段、老山段、官山段、老山下亚段厚8.5—57米,其底部含全区唯一有经济价值的B_4可采煤层,其厚度较稳定,结构较简单,全区发育平均厚约1.72米(图1)。
I. INTRODUCTION Yangqiao mine is located in the northern part of Yixian County and Yichun County, the western part of the Huashanling Tianmu Mountain fold belt, the western edge of the second Huaxia uplift belt, the Wugongshan-Jiuling II regional east-west structural belt Lin Bridge syncline, the east-west length of 42 km, north-south average width of 10 km, with a total area of about 420 square kilometers. The main strata exposed are: the Cretaceous, the Lower Triassic Daye Formation 689 meters thick, two Diego line (the system: Changxing 50-100 meters thick, Longtan Formation 499 meters thick; ). The coal seam is alternately deposited by sea and land in the Longtan Formation and divided into four parts from top to bottom: Wang Panli, Lion Rock, Laoshan, Guanshan and Laoshan under 8.5-57 meters thick, The only economically valuable B 4 recoverable seam has a more stable thickness and a simpler structure with an average thickness of about 1.72 meters (Figure 1).