Construction method of large-volume-filling-body strength model of two-step open-stope subsequent-filling

Abstract

The invention relates to a construction method of a large-volume-filling-body strength model of two-step open-stope subsequent-filling, and belongs to the technical field of mining. A cohesive-force calculation formula of a cementation filling body, an uniaxial-compressive-strength calculation formula and a shear strength calculation formula provided by the method form a complete strength calculation system, the large-volume-filling-body strength model of two-step open-stope subsequent-filling, and required strength of the cementation filling body is comprehensively calculated. Stability of the cementation filling body can by ensured by the cementation-filling-body strength, which is obtained through the model of the method, to provide a safe and reliable operation environment for two-stepstoping, the cementation filling body is also designed as layered filling according to a relationship between the required strength of the cementation filling body and height and can reduce a cementconsumption amount, safe and highly efficient stoping of mineral resources is realized with minimal filling costs, no-waste or low-waste mine mining is realized, mine environment protection is promoted, and mine disaster control is facilitated.

Description

Technical field [0001] The invention belongs to the field of mining technology, and specifically relates to a method for constructing a two-step empty field subsequent filling of a large-volume filling body strength model. Background technique [0002] As the basic industry at the forefront of the production chain, the mining and utilization of mineral resources not only provide the necessary materials for human construction, but also provide a guarantee for the development of the national economy and society. With the rapid development of human society, the demand for mineral products has increased rapidly. In the face of the huge economic benefits brought by mining activities, the concept of coordinated development of mineral resource development and environmental protection has been ignored. As a result, the storage of solid waste occupies a large amount of land, which causes the deterioration of the ecological environment; the extensive mining mode of "mining the rich and aba...

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Problems solved by technology

[0009] (2) From the mining sequence, it can be seen that the cemented filling body is exposed for as many as 2-4 times during the stage mining process. At the same time, the blasting volume of the mine room is large at one time, and the mining time is long, which makes the cemented filling body exposed for a long time

[0010] (3) One side of the cemented filling body is exposed, and the other side is a filling body with non-adhesive ending sand. Under the condition of bearing its own gravity, it also needs to bear the active pressure of non-adhesive ending sand, and the stress state is complicated

[0027] (2) Equation (1) is applicable to the condition that there is latera

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