Pit & Quarry, February 2016

and commercial work in the area has really grown in the last two to three years A growing need While Jones Bros does not build oilfield road and drill pads much of the stone it produces winds up as base material in the oil patch roadways and pads Concrete rock typically minus 1 in size is another big seller around here for all the concrete work in the oilfields Wallace says Wallace has noticed a growing need for crushed aggregate for oil patch roads and pads versus the pit run material used conventionally These usually unpaved roads typically have been built with 8 to 10 in of pit run placed on a bladed right of way Now oil companies find crushed screened aggregates result in a longer lasting road Some of the oil firms are requiring crushed material now because it lasts a whole lot longer than the pit run Wallace says Typically Jones Bros extracts caliche a layer of immature limestone that rests beneath a thin veneer of soil The friable caliche layer ranges from 3 to 6 ft deep to as much as 40 ft of good strong material The caliche is drilled and shot prior to crushing To this end Jones Bros began using two MR 110 ZS EVO crushers in June 2014 We had so many jobs that our existing equipment wasnt going to be able to get everything done Wallace says Knowing Kevin Taylor our Kirby Smith Machinery Inc territory manager he came up with a good plan and we got what we needed Mobile crushers can be complex pieces of equipment and the service Kirby Smith provided was a major reason Jones Bros went with the Kleemann equipment Service was important because we are far removed from larger population centers Wallace says The other distributors werent able to do what they said they were going to do Crusher foreman Chris Cisneros left and plant operator Gerardo Coronado pose in front of an MR 110 ZS EVO impact crusher at Jones Bros Church Pit Electric versus hydraulic Kleemanns electric driven platform as opposed to hydraulic drives was another plus for Jones Bros We were having a bunch of trouble with the hydraulic sides of the other machines says Danny Vasquez crusher superintendent Hoses were busting all the time with leaks everywhere Because the hoses were metric design the hydraulic shops here in town did not have the fittings We struggled to get parts and wanted to go with electric driven machines Electric driven crushers are more dependable Vasquez found Overall electric is more consistent he says There are fewer leaks and fewer hoses to deal with The system runs more efficiently Adds Chris Cisneros crusher foreman for Jones Bros Were using an average of 50 to 60 gallons of fuel less per day than wed use with the hydraulic machines about 200 a day per machine When you add that up over an eight to 10 day run its quite a bit The economy of less fuel consumption improves the companys bottom line substantially especially over a years time Wallace adds When visited the twin Kleemanns were operating at Jones Bros Cooper and Church pits Both machines were producing between 250 and 280 tph making all minus 1 in aggregate In both pits Jones Bros feeds the plants once a minute using a 42 in bucket on a Komatsu PC 360LP 10 excavator Chunks as large as 40 in are fed to the crushers A vibrating prescreen keeps the fines out of the impact crusher and combines them into the main feed It keeps the units from excessive wear and saves fuel as well Wallace says Its a good selling point Built in secondary screen The S in the nomenclature MR 110 ZS EVO indicates a full function secondary screen thats installed on Kleemanns load out conveyor Much of the stone Jones Bros produces is used as base material in oil patch roadways and pads PORTABLE PLANTS 34 PIT QUARRY February 2016 www pitandquarry com