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Gold Science and Technology ›› 2022, Vol. 30 ›› Issue (6): 901-911.doi: 10.11872/j.issn.1005-2518.2022.06.082

• Mining Technology and Mine Management • Previous Articles     Next Articles

A Study of Construction Technology and Application of Pulp-Soil Decline at an Underground Metal Mine

Jielin LI1(),Dehua MAO1,Chaozhi PENG2,Shengli WANG3,Mengbing FENG3,Mingliang ZHAO3,Ao LI1   

  1. 1.School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, China
    2.Kafang Branch Co. , Ltd. , Yunnan Tin Group, Gejiu 661000, Yunnan, China
    3.Beijing Road Plus Technology Co. , Ltd. , Beijing 102200, China
  • Received:2022-06-24 Revised:2022-10-22 Online:2022-12-31 Published:2023-01-06

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Abstract:

The decline is the main access channel of underground metal mines，and its road quality directly affects the safe transportation and economic benefits of the mine.Flat and durable roads can effectively reduce vehicle driving resistance，reduce fuel consumption and vehicle maintenance costs，and at the same time can extend the service life of tires，improve the work efficiency and safety comfort of vehicle transportation，and greatly reduce hauling costs.At present，the decline pavement mostly adopts concrete pouring method，which has the shortcomings of high road construction cost，long maintenance time，short service life and difficult maintenance.At present，the pulp-soil road construction technology has been widely used in the con-struction of open-pit mine roads，and has played an important role.But for underground mines，due to the construction environment of underground confined space，water accumulation on the floor or dripping on the roof，and high anti-skid requirements on the road，this technology is still less used.In order to solve the shortage of concrete road construction methods for underground mine decline，the construction process of slurry road construction technology in the decline construction of the Kafang Branch of Yunnan Tin Industry Co.，Ltd. was studied，and the mud belt length of the yellow clay in the area was quickly identified by using the mud belt method to be 80 cm.The disintegration method identified the good water resistance of yellow clay，and comprehensively determined that yellow clay was most suitable for building slurry dirt roads.The washing and screening test was carried out to determine the optimal material ratio of yellow clay，manufactured sand，fine aggregate and coarse aggregate，and the field test of pulp dirt road construction was carried out on the decline of the Kafang Branch，and the on-site construction process of the pulp road was introduced in detail.The results show that the pulp-soil road construction technology can be well applied to the underground mine road construction，and has many advantages such as simple construction technology，low road construction cost，short construction period，strong bearing capacity，dust and skid control，low carbon environmental protection，etc.It has important significance for the mine cost reduction and efficiency improvement，energy saving and emission reduction，safety and high efficiency.

Key words: underground metal mine, decline, biological enzyme, pulp-soil road, construction process

CLC Number: 

  • TD525

Fig.1

Action process of biological enzyme act on clay molecules（Liu et al.，2015；Ma et al.，2017）"

Table 1

Basic parameters of ore trucks"

参数数值
额定载重量/t12
料斗容量/m35.85±0.3
最大牵引力/kN112
爬坡能力（重载）/（°）12
最小离地间隙/mm270
轴距/mm3 350±30
轮距/mm1 380
整车重量/t13±0.5

Fig.2

Concrete pavements on slope ramps and mine car tire wear situation"

Fig.3

Clay disintegration test"

Fig.4

Clay rubbing length"

Fig.5

Road construction material"

Fig.6

Biological enzyme"

Fig.7

Wash and siev test process"

Fig.8

Preparation of road construction materials"

Fig.9

Construction site operations of pulp-soil road underground road"

Fig.10

Effect comparison before and after road construction at the same location"

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