樟树市是地处江西中部平原地带的县级市 ,人地矛盾比较突出 ,人均耕地面积不足0 8亩。长期以来 ,城乡房屋建筑墙体材料一直都以实心粘土砖为主 ,年实心粘土砖产量达 6亿块标砖 ,占墙材总量的 98%以上 ,年烧砖耗标煤 6 5万吨以上 ,毁地 6 0 0左右(以每亩挖深 3米计算 )。因此 Yushu City is a county-level city located in the central plain of Jiangxi Province. The contradiction between man and land is relatively prominent. Per capita arable land is less than 0-8 mu. For a long time, the wall materials of urban and rural housing construction have been mainly solid clay bricks. The annual output of solid clay bricks has reached 600 million standard bricks, accounting for more than 98% of the total amount of wall materials, and annual burning of bricks has consumed 65,000 tons of standard coal. Above, the destruction of the ground is about 600 (calculated at a depth of 3 meters per mu). therefore