Mobile distributed underground cementing filling method and system

Abstract

The invention discloses a mobile distributed underground cementing filling method and system. The method comprises the steps that tailing mortar and a cementing material of a separating plant are conveyed to at least one working area underground to-be-filled area through pipelines respectively, mixing and stirring are performed on site to prepare a paste filling material, and underground cementingand filling are carried out. By means of the mobile distributed underground cementing filling method and system, the length and complexity of a filling pipe network can be reduced as much as possible, and the conveying distance of the paste filling material which is higher in concentration, large in viscosity and poor in fluidity after the tailing mortar is mixed with the cementing material is shortened; and metering and stirring devices and a filling pump for paste filling material preparation and filling are made close to underground to-be-filled areas of all working areas as much as possible, and long-distance pipeline conveying is adopted for tailing mortar and cementing material which are stable in conveying performance and fluidity. According to the scheme of the mobile distributedunderground cementing filling method and system, the safety and reliability are greatly improved, the running cost is greatly reduced, and remarkable economical efficiency is achieved.

Description

technical field [0001] The invention belongs to an underground filling system and method, in particular to a mobile distributed underground cementing filling method and system. Background technique [0002] It is the development direction of modern mines to use the tailings of the dressing plant for underground cement filling. At present, the main technical scheme is to set up a fixed centralized filling station on the ground, and complete the preparation of tailings cemented paste filling in the filling station. The cementitious material cement is mixed and activated in proportion to make a paste filling material, which is then transported to the underground filling area through the filling pipe network by gravity or pumping. [0003] This kind of ground fixed centralized filling station is suitable for mines with concentrated underground mining and not widely distributed, but for non-centralized but distributed underground mining, such as non-ferrous metal mines, it has i...

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Problems solved by technology

[0003] This kind of ground fixed centralized filling station is suitable for mines with concentrated underground mining and not widely distributed, but for non-centralized but distributed underground mining, such as non-ferrous metal mines, it has its shortcomings: first, mining enterprises Usually only one beneficiation plant is concentrated to produce tailings at one point; the second is that a mining enterprise's underground mining area is widely distributed, and the working areas are separated by thousands of meters or more, and the underground roadways of each working area are along the detection Mineral vein resources are excavated in a multi-layered, long snake formation, up to more than ten kilometers. The underground filling areas that need to be cemented are naturally scattered and far away. The layout of the filling station takes care of one and loses the other, often resulting in too long and complicated filling pipe (network) line (up to more than ten kilometers long), and the filling pump is used to transport the paste tailings with cement to each filling work surface for a long distance , it is easy to block pipes due to improper proportioning, control errors, power outages, equipment failures, pipeline cavitation failures, etc.; it is very difficult to judge and unblock the blocked pipe points. Over time, the fluidity of the unblocked paste material will change. Poor, even settlement and segregation, cementation and skinning, and hardening phenomenon occur, which significantly increase the resistance along the way. When the pumping system is restarted, it is often impossible to pump due to excessive pressure, resulting in the entire pipeline being blocked, and even part of the pipeline is abandoned.

[0004] In order to adapt to this working condition, the pressure head of the filling pump must be multiplied by several times, resulting in high cost of the special pumping main engine, too high pressure head, excessive power, high power consumption, large consumables and maintenance, and filling high operating costs

[0005] For filling pipes (networks) distributed tens of kilometers, it is unrealistic to rely on special filling pumps for long-distance transportation of paste tailings with cement to each dispersed filling work surface, and it is very expensive to build multiple filling pipes in each work area. ground filling stations, which make it difficult for such mines to achieve safe, reliable and economical completion of underground cemented filling of tailings

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