M-BUS metering data converter is with M-BUS and
USB interface, which is collected with M-BUS meters and meter reading primary
station separately. The communication with M-BUS meters is based on tree
collection. This data concentrator is single non-communication converter, supporting
data transmission and sending reading orders through USB collection. The quantity to collect with the meters(Meters Data Transceiver) is 60pcs and 360pcs.
Function of the M-Bus Converter:
Working
voltage:AC220V
Power:10W
Interface: up:USB
down:M-BUS
Quantity:≤60pcs,360pcs
VBUS:high level 39V,low level 23V
BUS
load current:≤200mA
Path
protection:over current,short cut protection,reset automatically when failure deleted; need
man resetting when long-time over current
Status
indicator: power; receiving and sending; over load warning
wiring:0.75mm2~2mm2;wire
resistance≤50Ω
transmission
:1000meters
working
environment:temperature:-30℃~80℃
humidity:≤90
M-Bus Converter M-Bus Converter,Wireless M-Bus Converter,Wireless Meter Reader,M-Bus Connector,Data Concentrator,Metering Data Converter,Meters Data Transceiver Berggruen Technology Co.,Ltd , http://www.meter-technology.com
Uranium mining example - 711 mine trackless mining level stratified filling mining method
I. Geological overview
The deposit belongs to the medium-low temperature hydrothermal volcanic deposit. The ore body is located at the top of the rhyolite, the mineralization is uneven, controlled by lithology and structure, and the shape of the ore body changes greatly. It is an irregular lens body with a length of 30-140 m and a dip angle of 30°-45°. The ore is rhyolite and stable, ƒ=8~12. The upper plate is welded tuff (green layer), soft, ƒ = 6 ~ 8, swell with water, easy to weather and fall; the lower plate is rhyolite, stable, ƒ = 10 ~ 12.
Second, the slope road development. Use the foldback ramp to develop, as shown in Figure 1. From the 170m flat track, the ramp is boring with trackless equipment. It has reached the 110m stage and will continue to extend to the deep. The slope section is 3×2.8m and the slope is 15%-20%.
Figure 1 Slope Road Development
1-170m flat; 2 - ramp; 3 - contact; 4 - slip mine; 5 - contact
Third, mining methods. The upper level stratified filling method is adopted for the trackless mining. as shown in picture 2. Trackless mining and mining technology, using L-832C trolley to drill, the depth of the blasthole is 3.5m, the drilling efficiency of the bench is 98.9m; the detonation with the differential electric detonator and the non-conducting blasting tube; the blasting of the ore with LF-4.1 The machine is transported to the mine or directly to the surface; when the transport distance is 60m, the average efficiency of the shift is 160t; the use of the trackless equipment for the prospecting and cutting of the surrounding wall, high efficiency, fast speed, and the stop when looking for the edge The production capacity can reach 2000~3200 tons/month; fill the flat field with the scraper, and the transportation distance is 20~30m. The average hourly filling capacity is 60.2m 3 . The floor of the stope is laid with 18~20cm thick concrete slab, the water-cement ratio is 0.7-0.8, the proportion (weight) cement: sand: gravel = 1:2.2:4.3, the compressive strength after 5.2MPa is 5.2MPa, filling and concrete pad 37.7%. The ventilation speed of the stope is 0.11~0.21m/s. The air volume is 5~6m 3 /min. According to the air volume of the drainage and the rake body, the diesel exhaust gas requirements can be met.
Figure 2 Trackless mining method map
1—trackless equipment channel; 2—slope track; 3—contact road; 4—scraper transporting mine roadway; 5—ventilation filling along the vein roadway; 6—slip mine;
7—Shunlu ventilation shaft; 8—patio; 9—scraping machine; 10—rock drilling rig; 11—rock column; 12—mine heap; 13—gun hole; 14—filling body
Fourth, the main technical and economic indicators
The comparison indicators between the trackless mining and the conventional filling method are listed in Table 1.
Table 1 Comparison of technical and economic indicators of 711 mine trackless mining and conventional filling method
Indicator name
unit
Trackless
conventional
Indicator name
unit
Trackless
conventional
Stop production capacity
Trolley efficiency
Scraper efficiency
Mining efficiency
Depletion rate
Loss rate
t/d
Meter/table
Tons / shift
Tons / shift
%
%
156
98.9
167.1
10.9
6.9
1.5
39
30
50
4.5
10
2.8
Material consumption
Explosive
Detonator
Brazed head
Wheel tire
Wood
Cement
Kg/kt
/kt
/kt
Only /kt
m 3 /kt
t/kt
480
430
30
1.3
3.6
640
100
55
5
10
Cost
Quantity
%
Cost
Quantity
%
Material
Power
Wage
direct cost
Yuan / ton
Yuan / ton
Yuan / ton
Yuan / ton
6.021
6.11
4.81
17.50
5.00
8.20
9.70
22.90
Shipping fee
Workshop funding
Enterprise management fee
Mine cost
Yuan / ton
Yuan / ton
Yuan / ton
Yuan / ton
4.59
5.70
19.87
47.60
4.77
10.40
26.15
64.20