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一、烟囱特征及地面环境条件 南桐矿务局干坝子原焦场烟囱高46m,下口直径4.6m,由红砖砂浆砌成,厚度为630mm,分两层,内衬360mm,外层240mm,层间留30mm空隙。从上到下有钢筋环两层,环距1m左右。 烟囱北侧距民房分别为2.5m、4m、7m等;烟囱东侧距电线杆和墙分别为0.5m和2.5m;正南侧距6600V高压线67m(见图1)。
I. Features of the chimney and environmental conditions on the ground The chimney of the original coke field of the Nantong Mining Bureau is 46m high and the diameter of the lower outlet is 4.6m. It is made of red brick mortar and has a thickness of 630mm. It is divided into two layers with a lining of 360mm and an outer layer of 240mm. , Leave 30mm gap between layers. There are two layers of steel rings from the top to the bottom, and the ring distance is about 1m. The north side of the chimney is 2.5m, 4m, and 7m away from the residential houses; the east side of the chimney is 0.5m and 2.5m away from the power poles and walls; and the south side of the chimney is 67m away from the 6600V high-voltage line (see Figure 1).